pycurl install looks for a non-existent file (libcurl.a)

I'm running a Gentoo Linux system under which I've never had problems installing anything into my virtualenv using pip. I've managed installing PIL and django, but for some reason, pycurl (a dependency of cloudkey) is flipping out, claiming that I don't have libcurl.a (note that it's not .la) on my system.

curl is installed. In fact, pycurl is installed on the host system just fine, but it just won't install into my virtualenv. Here's the output:

$ pip install cloudkey
Requirement already satisfied (use --upgrade to upgrade): cloudkey in /path/to/virtualenv/lib/python2.6/site-packages
Requirement already satisfied (use --upgrade to upgrade): distribute in /path/to/virtualenv/lib/python2.6/site-packages (from cloudkey)
Requirement already satisfied (use --upgrade to upgrade): simplejson>=2.0.9 in /path/to/virtualenv/lib/python2.6/site-packages (from cloudkey)
Downloading/unpacking pycurl>=7.19.0 (from cloudkey)
  Downloading pycurl-7.19.0.tar.gz (71Kb): 71Kb downloaded
  Running setup.py egg_info for package pycurl
Using curl-config (libcurl 7.23.1)
Installing collected packages: pycurl
  Running setup.py install for pycurl
Using curl-config (libcurl 7.23.1)
building 'pycurl' extension
x86_64-pc-linux-gnu-gcc -pthread -fPIC -DHAVE_CURL_OPENSSL=1 -DHAVE_CURL_OPENSSL=1 -DHAVE_CURL_OPENSSL=1 -DHAVE_CURL_OPENSSL=1 -DHAVE_CURL_SSL=1 -I/usr/include/python2.6 -c src/pycurl.c -o build/temp.linux-x86_64-2.6/src/pycurl.o
x86_64-pc-linux-gnu-gcc -pthread -shared build/temp.linux-x86_64-2.6/src/pycurl.o -L/usr/lib64 -lcurl -lssl -lcrypto -lldap -lrt -lssl -lcrypto -lz -lssl -lcrypto -lldap -lrt -lssl -lcrypto -lz -lpython2.6 -o build/lib.linux-x86_64-2.6/pycurl.so /usr/lib64/libcurl.a -Wl,-O1 -Wl,--as-needed
x86_64-pc-linux-gnu-gcc: /usr/lib64/libcurl.a: No such file or directory
error: command 'x86_64-pc-linux-gnu-gcc' failed with exit status 1
Complete output from command /path/to/virtualenv/bin/python2.6 -c "import setuptools;__file__='/path/to/virtualenv/build/pycurl/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --single-version-externally-managed --record /tmp/pip-kkwDnf-record/install-record.txt --install-headers /path/to/virtualenv/include/site/python2.6:
Using curl-config (libcurl 7.23.1)

running install

running build

running build_py

creating build

creating build/lib.linux-x86_64-2.6

creating build/lib.linux-x86_64-2.6/curl

copying python/curl/__init__.py -> build/lib.linux-x86_64-2.6/curl

running build_ext

building 'pycurl' extension

creating build/temp.linux-x86_64-2.6

creating build/temp.linux-x86_64-2.6/src

x86_64-pc-linux-gnu-gcc -pthread -fPIC -DHAVE_CURL_OPENSSL=1 -DHAVE_CURL_OPENSSL=1 -DHAVE_CURL_OPENSSL=1 -DHAVE_CURL_OPENSSL=1 -DHAVE_CURL_SSL=1 -I/usr/include/python2.6 -c src/pycurl.c -o build/temp.linux-x86_64-2.6/src/pycurl.o

x86_64-pc-linux-gnu-gcc -pthread -shared build/temp.linux-x86_64-2.6/src/pycurl.o -L/usr/lib64 -lcurl -lssl -lcrypto -lldap -lrt -lssl -lcrypto -lz -lssl -lcrypto -lldap -lrt -lssl -lcrypto -lz -lpython2.6 -o build/lib.linux-x86_64-2.6/pycurl.so /usr/lib64/libcurl.a -Wl,-O1 -Wl,--as-needed

x86_64-pc-linux-gnu-gcc: /usr/lib64/libcurl.a: No such file or directory

error: command 'x86_64-pc-linux-gnu-gcc' failed with exit status 1

----------------------------------------
Command /path/to/virtualenv/bin/python2.6 -c "import setuptools;__file__='/path/to/virtualenv/build/pycurl/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --single-version-externally-managed --record /tmp/pip-kkwDnf-record/install-record.txt --install-headers /path/to/virtualenv/include/site/python2.6 failed with error code 1
Storing complete log in /home/daniel/.pip/pip.log

Any ideas/suggestions?